Lost-motion take-up for tools.



J. G. BAKER..

LOST MOTION TAKE-UP FOR TOOLS. APPLICATION FILED was. 1913.

1 1 41,602 Q Patented June 1, 1915.

.u/RRIS PETERS CO., FHOTO-LITHO. WASHINGTDN. D. C. I

To all whom it may concern rinrrnn srarnsrarnn'r enric JOSEPH BAKER, FAIILENTOWN, PENIISYLVANIA, ASSIGNOR T0 J. EDWARD DURHAM, OFPHILADELPHIA, PENNSYLVANIA.

isteria Be it known that I, JOSEPH G. BAKER, a

citizen of the United States, residing at Allentown, in the county ofLehigh and State of Pennsylvania, have invented new and usefulImprovements in Lost-Motion Take-Up for Tools, of which the following isa specification.

My invention relates to new and useful improvements in lost. motion takeup for tools, and has for its object to provide an exceedingly simpleand effective device of this character, whereby all lost motion will beeliminated between the movable jaw and the operating screw, and I haveshown my invention applied to a wrench and a vise, but it can be appliedto other tools of this same. general class without changing theprinciples of the'invention.

A further object of the invention is to provide a device of thischaracter which will be relatively inexpensive in the cost-ofmanufacture yet strong and durable and exceedingly compact, and soarranged as not to change the appearance of the tool.

With these ends in view this invention 7 consists in the details ofconstruction and combination of elements hereinafter set forth, and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains mayunderstand how to make and use the same, I will describeits construction in detail, referring by numeral to the accompanyingdrawing forming a part of this specification, in

Figure 1 is a longitudinal sectional view of one form of a wrenchshowing my invention applied thereto; and Fig. 2, is a similar view of avise.

In carrying out my invention as illustrated in Fig. 1', 2 represents awrench having a handle 3, a head 4: and a stationary jaw 5 projectingfrom said head. In the 7 head 4 is formed the cavity 6, in which isSpecification of Letters Patent.

Patented June 1, 1915.

Application filed August 6, 1913. Serial'No. 783,422.

mounted upon the journaled screw 14: having a threaded end 15 which isthreaded lnto the opening 8. The operating screw 13 has an opening 16running part way therethrough, and another opening 17 of greaterdiameter than the first named opening, the latter running the rest ofthe way through the operating screw and forming a shoulder 18 againstwhich rests one end of the helical spring 19 coiled about the journaledscrew 14, while the opposite end rests against one of the side walls ofthe cavity 6. From this description it will be seen that the helicalsprings 17 forces the operating screw 13 away from one side wall andagainst the opposite side wall of the cavity 6, so that when saidoperating screw is manipulated to force the movable jaw 10 into contactwith the work, the thrust will be against the side wall of the cavity 6on which the end of the operating screw is held in contact with, thuseliminating the lost motion between the operating screw and the workingface of the movable jaw.

In Fig. 2 I have illustrated my invention as applied to a vise, in which20 denotes the frame carrying the stationary jaw 21 and the fixed nut22, into which is threaded the operating screw 23, the latter beingjournaled in the movable jaw 24, the slide 25 of which is mounted in theframe 21. On the operating screw 23 is mounted the washer 26 held in itsadjusted position by a set screw 27 and against this washer rests oneend of the helical spring 19 which is coiled about the operating screw23, and the opposite end of said spring rests against a loose washer 28mounted upon the operating screw 23 and bearing against the inner faceof the jaw 24:, so that the head 29 of the operating screw is forcedagainst the outer face of the movable jaw 2%, thereby taking up any lostmotion between the operating screw and the working face of the movablejaw 24. As will be readily understood this device may be applied totools of difi'erent construction with slight variations in the workingparts as well as to tools of this same general class, without changingthe principles of my invention.

Of course I do not wish to be limited to the exact details ofconstruction as herein shown, as these may be varied within the limitsof the appended claims without departing from the spirit of myinvention.

1. In a device of the character stated a wrench comprising a' handle, ahead having I a cavity therein, a stationary jaw projecting from saidhead, a movable jaw provided V produce shoulder, a screw mountedin witha shank slidably mounted in the head, said shank having sectionalthreads which project into the cavity, an operating screw provided withanopening passing part way therethrough, another opening of greaterdiameter passing the remainder ofthe way therethrough, thereby forming ashoulder, a journaled screw threaded into the head and passing throughsaid openings in the operating screw, a helical spring coiled about thejournaled screw, one endthereof resting against the shoulder, and theopposite end against one of the side walls of the cavity in the head,thereby takingup the lost motion between the operating screw and theworking face of the movable jaw.

. 2; A wrench comprising a head having a cavity therein, an integralhandle formed therewith, a stationary jaw projecting from said head, amovable jaw slidably mounted in. said head and provided with sectionalCopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

7 threads, an adjusting screw of less length than the cavity in the headmounted in said cavity and-"arranged to coact with the isec tionalthreads for operating the movable jaw, said screw having a central-boretherethrough of two different) diameters to the head for journaling. theadjusting screw thereon, and a helical spring coiled about the journaledscrew and contained within the larger portionof the bore in theadjusting screw, 7 one end of said spring resting against the shoulderwithin'the adjusting screw and the other end againstone of the walls ofthe cavity in the head, whereby} said adjusting screw is forcedto Wardthe stationary jawfor taking up the lost motion between the operatingscrew and the working face between the movable jaw.

' In testimony whereof, I have hereuntoaflixed my 'Isig-nature in thepresence of two subscribing witnessesn i J E H G- AKER.

Witnesses; i V

ELLA M. SNYDER, JED'WD. DusHaNE, J

Washington, D. 0."

